Year	kt
1960	9511.22637608153
1961	14207.53168602664
1962	17838.442904921576
1963	10682.90931029202
1964	16720.504367215253
1965	17773.454864340645
1966	16834.1006864072
1967	20442.968365351495
1968	21928.458693246237
1969	22094.48408283447
1970	28962.692304747816
1971	35034.81029925753
1972	36157.356895306555
1973	43364.36811507653
1974	39524.99668345361
1975	41870.551244069655
1976	47081.43875024273
1977	54065.68780503801
1978	53165.90337396369
1979	52231.17585818747
1980	51873.009239992825
1981	45059.107723119385
1982	41630.317536744
1983	34130.65798259548
1984	35781.718734760965
1985	35288.147663346426
1986	34676.64368106291
1987	37148.8669237234
1988	37817.15341864751
1989	40682.486364204546
1990	42565.04505252022
1991	43473.86291997678
1992	46485.86216440928
1993	49722.33697655771
1994	48821.46254431018
1995	48966.047329732646
1996	52914.32416242233
1997	55850.50749715492
1998	60499.46444381489
1999	58846.00766693264
2000	59813.61353860588
2001	67109.58424915357
2002	66038.17391615137
2003	69251.8813212662
2004	63760.10284417126
2005	68482.66251774045
2006	78153.48524227104
2007	76576.00123131154
2008	78337.34118760434
2009	72288.48058613938
2010	74969.10026909862
2011	69170.28375328696
2012	65246.79787987472
2013	71615.56782621956
2014	62522.052770035494
2015	61371.11455224915
2016	64139.98508896838